Machine for grinding and polishing rifle-barrels



(No MoIdel.) 3 Sheets-Sheet 1. 0. M. GRIMES.

MACHINE FOR GRINDING AND POLISHING RIFLE BARRELS. I No. 406,648. Patented July 9, 1889.

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(No Model.) 3 Sheets-Sheet 2.

0. M..GRIMES. MACHINE FOR GRINDING AND POLISHING RIFLE BARRBLS. No. 406,643. I Patented July 9, 1889.

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O. M. GRIMES. MACHINE FOR GRINDINGAND POLISHING RIFLE, BABRBLS. No. 406,643. Patented July 9, 1889..

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ORLANDO M. GRIMES, OF NEWV I-IAVEN, CONNECTICUT.

MACHINE FOR GRINDING AND POLISHING RlFLE-BARRELS.

SPECIFICATION forming part of Letters Patent No. 406,643, dated July 9, 1889. Application filed August 23, 1888. Serial No. 283,553. (No model.)

To all whom it may concern:

I Be it known that I, ORLANDO M. GRIMEs, of New Haven, in the county of New Haven and State of Connecticut, have invented a new and Improved Machine for Grinding and Polishing Rifle-Barrels, of which the following is a full, clear, and exact description.

My invention relates to an improvement in machines for grinding and polishing riflebarrels, and has for its object to provide a means of obtaining the greatest possible results with the least amount of hand labor, and to provide amachine of simple, durable, and economical construction.

The invention consists in the construction and combination of the several parts, as will be hereinafter fully set forth, and pointed out in the claims.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar letters of reference indicate corresponding parts in all the figures.

Figure 1 is a longitudinal vertical section through the machine, on line a; at of Fig. 3, and Fig. 2 is a transverse vertical section on line yyof Fig. 1. Fig. 3 isa plan view, and Fig. lis a side elevation. Fig. 5 isa side elevation of the machine with the tool-holder and pressure-roller applied, and Fig. 6 is an end elevation.

In carrying out the invention the frame consists, ordinarily, of two parallel side pieces 10, provided with a longitudinal channel in the upper edge, as best shown in Fig. 2. The side pieces are united at the ends by suitable transverse braces 11 and at the center by a vertical pillar 12.

From the outer face of the side pieces, at each side of the center, standards 13 and 14 are upwardly projected, each being provided with a longitudinal opening 15, in which openings boxes 16 are held, rendered vertically adjustable by an attached threaded rod .form wear of the said rollers.

tend beyond the boxes. Each shaft is provided with a pulley at or near the outer end and a roller rigidly attached thereto between the standards, a Solid emery-roller 24 being secured upon the shaft 21 and a leatherbuffroller 23 upon the shaft 22, as best shown in Fig. 1. Below the rollers 23 and 24 a table 25 is held to slide in the grooves produced in the side pieces of the frame, and from the under face of the table, at or near the extremi- V ties, lugs 26 are projected, adapted to receive the reduced ends of a longitudinal feedsorew 27. The feed-screw passes through an .interiorly-threaded hub .28, held to revolve in the frame-pillar '12, which hub is provided with a worIn-wheel 29, integral with one end, and a spur-wheel 30 at the opposite end. The hub is rotated through the medium of a worm-shaft 31, having secured thereto a suitable driving-pulley, as best shown in Fig. 2. The drive-shaft 31 and its connections are purposed to accomplish two obj ects-namely, to laterally feed the table 25 and also to laterally reciprocate the roller-shafts while the same are revolving, in order to insure a uni- The latter object is attained by pivoting rocking levels 32 near their centers to studs 33, horizontally extended from the frame, the upper ends of said rocking levers engaging the extremities of the roller-shaftaithe lowerends being connected by a link with shafts 34: and journaled in the lower portion of the frame, one shaft at each side of the pillar 12.

Each shaft 34 is provided with attached spaced fingers 35, adapted for engagement with cams 36, carried by a short longitudinal shaft 36, journaled in the said pillar 12, and upon the latter shaft a gear-Wheel 37 is keyed, meshing with a pinion 38, integral with a spur-wheel 39, studded to pillar 12, the latter" wheel meshing with the spur-wheel of the hub 28, as best shown in Figs. 1 and 2.

The gearing above described is so proportioned as to produce one revolution of the cam to about ten or twelve inches forward travel of the table.

Any desired number of barrels are held upon the table beneath the rollers by means of a head-stock 40 and tail-stock 41, secured to the table as shown in Fig. 1, the headspirit of the invention, and that any approved form of head and tail stock may be substituted for that shown.

In practice I propose to attach a bracketarm and 61 (see Figs. 5 and 6) to the standards 1-3 and 14, respectively, to receive a diamond-carrying tool 62, forturning the emery-roller and a pressure-roller to assist in recoating the buff-roller.

63, While the roller is adjusted toward the emy-roller by means of screws 71.

Having thus described my invention, whatI clalm as new, and desire to secure by Letters Patent, is-

opposite front andrear standards, parallel transverse shafts journaled in said standards,

a buffing-roller on one shaft and a grindingroller on the other, and pulleys on said shafts, of upward-extending levers pivoted between their ends to the opposite sides of the frame and engaging at their upper ends the opposite ends of both roller-shafts, a transverse shaft connecting the lower ends of each pair of levers, and a longitudinally-extending shaft having cams for operating said two connecting-shafts, substantially as set forth.

2, The combination, with the frame and the transverse roller journaled thereon, of a longitudinally-reciprocating table under the The tool-holder 62 is fed transversely by means of the feed-screw roller, and a head and a tail stock mounted on the said table and provided, respectively, with 'a longitudinally-extending aligned key and spindle, substantially as set forth.

3. The combination, with the reciprocating table, of a head-stock provided with a series of longitudinally-extending parallel keys, a transverse shaft geared to the outer ends of said keys for rotating them, and a series of parallel longitudinally-sliding spindles mounted in the tail-stoekein alignment with said keys, substantially as set forth.

4. The combinatiomwith the frame, the rollers, the levers 32, one for each roller, engaging at their upper ends the ends of the roller shafts, the transverse shafts 34 .34, connecting the lower ends of said levers and provided with vertical fingers 35, the longitudinally-extending shaft 36, having cams 36 36 between said fingers, and a gear-Wheel 37, of the longitudinally-reciprocating table having a feedscrew 27, a rotary internally-threaded hub 28, through which the said screw passes, a drive shaft geared to said hub, and a pinion 30 on the hub, a pinion 39, driven by the pinion 30, and a smaller pinion 38, connected with pinion 39 and meshing into gear-wheel 37, substantially as set forth.

5. In a machine for grinding and polishing rifle-barrels, the combination, with slotted .1. The combinatiomwith the frame having standards, vertically-adj ustable boxes held in said standards, rotary roller-carrying shafts journaled in said boxes capable of lateral movement, and a sliding table below said shafts, of levers engaging the ends of the roller-shafts, finger-carrying shafts linked to said levers, aeam in frictional contact with the fingers, a feed-bar attached to the table, and a drive-shaft and gearing, substantially as shown and described, connecting the driveshaft with the cam-shaft and table-feed, as and for the purpose specified. I

ORLANDO M. GRIMES. WVitnesses:

PHILLIP GOODI-IART, WM. H. BEECHER. 

